Remember what it was like to learn how to drive an automobile. Granted, it was years ago and might be somewhat difficult to get beyond that memory of horror on the face of your instructor, but, do you remember how your shoulder and neck muscles tensed? How tired you were after a lesson? How nervous you were? Now, if you need to drive somewhere you just hop in the car and go. Just a reminder to you that learning a new skill involves a bit of nervousness and discomfort. So, when you get a kink in your neck from trying to visualize, know that with practice it will get easier.